recently introduced to the newer option for find...does an older option exist?

To find all the files in your home directory that have been edited in some way since the last tar file, use this command:

find . -newer  backup.tar.gz

Is anyone familiar with an older solution?

looking to identify files older then 15mins across several directories.

thanks,
manny

Negate the test.

find . -type f ! -newer backup.tar.gz

that was easier then I thought

thanks